Windmill



A. LEIMI.

WINDMILL.

APPLICATION FILED DCT. 7, 1920.

3 BY V ATTORNEY.

Patented Apr. 18, 1922,

Y. 2 SHEETS-SHEET l.

'ua-irse stares rfa-.raar Aseries..

nlvnnrawf LEIMI, or BALo.,M1NNEsoTA.

" WINDMILL. i

T'o-aZZ whom imag/concern: i Y A Y Be it known that I, ANDREW LmMI, 'alcitizen ofFinland, Europe,.residing at- Palo, in the county ofy St. Louis and; State ofA Minnesota, have invented` certain; new-'and useful yImprovements ,inuvVindmilla of which the following is a specification.:` a

ThisV invention f relates'` to improvements in wind millsand its chief' objectl is-to provide. a--wind-millof maximum power but of simple construction. Another object isf to provideA al novel-and. positive methodf of featheringi Fig. 3 is an enlargedfragmentary view` showing the position of diametrically opposite blades when the mill is in operation.

Fig. 4 is a plan view.` of Fig. 3.' Like reference characters denote corresponding parts throughout the several views.

The reference numerall denotes a framework wherein thev vertically disposed rotary shaft 2,v formed with the longitudinal groovel 2", is operatively supported, thatis driven by the mill blades ;A power transmission mechanism of any kind desired may be as- Sociated with theshaft 2 to transmit power therefrom to the pump or other mechanism to be operated by thermilL The shaft 2 is provided with a lower 'set of'rardial arms' 3 and an upper setof Vradial arms 4.l The' successive arms of each' set are disposed at right anglesto each other. Each arm 3 or y 4 is provided with a blade comprising a pair of wings 5, 6 and each wing is connected by a hinge 7 to its supporting arm 3cr 4. AV

spring arm 8 is secured to each radial arm and the upper end 'of each spring arm is con- "nected by a cord or flexible-memberV 9-to the upper edge of the'adj acent `wing 5, said cord beyond Vits point of positive engagement' with said wing-edge extendingv to the perforated end 10, tog-which itV ismade.A fast, of

' spcication of Letters ,raientY i Y Applicationmeaoctobem, 1920; seriaifnaw 43,4281

.of the same as the mill j wings are placedV yin position to receive the to the wind.4

ratentea'iiipi-L is, 1922.?

a post' ll-vwhich-*is carriedaby ,achy radiali armL uat a` point substantially`midwayf be,- tweenrtheiwings 5.,l 6 of each-blade. l g Made'fasttothe outer or; relatively remote edgesaof each blade 5,6A are the-'cords-12,Y 13

which extendrto V.and through the :perforated en'ds110 of'postsv11 andare thenunitedfto Y form the cord14', each cord 14from-afblade i 5, 6 Aextending through azperforation. 15 vin the shaft 21 to the perforatedend 10 yof the post 11. of'. thetradial; armi diametricallyg-opgl posit-e', an'clfro1n.,said postsendz 10 thecord 1.42 brancheszout to: formother ycords12','f;13ky Y which,` run: to; wingsi, Gioif the f diametrically opposed blade. f K

.'llhep'u-rpose; of the ,cordsf9f and spring ari'n l Y or open. The mill is driven bythe wind blowing between the pairs of wingsof any blade. This tends to spread said wings Vand causes the radial arms-.to rotate the shaft 2. Spreading the wingszof any blade causes its cords 12, 13y to Ydraw cord-14 and socontract vthe wings of the blade diametricallyfoppo? to the wind'and thusfeather this blade orv y8 isrto yieldinglyy retainatlie wings; 5V raised. Y I

cause it to partially closeand offer slight rev-i" Asistance to' the `wind untilsuch'time as its wind between them. The membersfof an57 pairof diametrically opposedV blades will face the wind alternately and Awhen n any given blade is back-to the windl its resist- `ance to the same is at the minimum; when thatlbladeis faced to the .wind it is expanded thereby'and its resistance at the maximum.

the shaft 2 where said drop Cords are united .in the common drop cord 17 which extendsl From each cord 14 adrop cord 16 extendsto through a vertical tube 18 disposed Yin the ff longitudinal groove 2a in the said shaft2, the lower end of said cord 17 beingoutside the lower end' of the vtube 18 in easy reach of the operator whov may grasp the `same'to 'pull 1 the wings closed when it isdesired to'pretain" the-mill vat rest. The mill Vis stoppeat any time bythe use of l'an ordinary brake f (not shown) .applied to the shaft 2 andthe f .i i

wings-then closed in the manner described.` The mill willbe started by anordinary wind, when thev brake isoif, as a greater surface is presented tothe wind by the blades facedzto the wind then by the bladespositioned-back-v Whatiselaimed s:Y p, l V1.V In a windmill,a framework,ka rotary site which bladeYV is positioned with its back 'f' Y grooved shaft arranged therein, a tube disposed in the groove in said shaft, radial arms carried by said shaft, said arms being dis# posed successively at right angles to each spring armcarried by each of said radial arms, a flexibie element connecting said spring arm and post with one Wing of each pair of Wings to yieldingly retain the same in a predetermined position, a second fieXible element passing through Va perforation in the said grooved shaft and having its ends branched and connected to each Wing of each pair of diametrically opposed Wings, and a second pair of branches formed from said second flexible element, said second pair of branches being united Within the aforesaid tube to form a drop cord.

2. In a Windmill, a framework, a rotary groove-d shaft arrangedtherein, a tube disposed in the groove in said shaft, radial arms carried by said shaft, said arms being disposed successively at right angles to each other, Wings hinged in pairs to `said arms, a spring arm carried by each of said radial arms and extending upwardly therefrom, a

other, Wings hinged in pairs to said arms, a Y

post carried by each of said radial arms and disposed upon the opposite side of said Wings with relation to said spring arm, said post having a perforated free end, a liexible element secured to one edge of one Wing of eaeh pair of Wings and its extremities secured to said spring arm and perforated post to yieldingly retain said Wing in a predetermined position, a second flexible element passing through a perforation in the said grooved shaft and having its ends branched and slidably engaging the perforated ends of the aforesaid posts and secured to the Wings of each pair of diametrically opposed Wings, and a second pair of branches formed from said second flexible element, said second pair of branches being united Within the aforesaid tube to forni a drop cord.

In testimony that l claim the foregoing as my oivn l have hereto afxed my signature in the presence of two subscribing Witnesses.

ANDREV LEIMI.

i/Vitnesses CARL H. SoHUs'rE, HrLMA ERIoKsoN. 

